hitunglah hasil dari 2 sin 75 derajat, cos 15

2.sin A cos B = sin (A + B) + sin(A - B)

2 sin 75° .cos 15° = sin(75° + 15°) + sin(75° - 15°)
                             = sin 90° + sin 60°
                             = 1 + √3/2
                             = (2 + √3) / 2